On Sat, Jul 14, 2018 at 03:21:13PM +0300, Haneen Mohammed wrote:
> Call atomic_helper_check_plane_state to clip plane coordinates.
>
> Signed-off-by: Haneen Mohammed <hamohammed...@gmail.com>
Reviewed-by: Sean Paul <seanp...@chromium.org>
> ---
> Changes in v2:
> - check for plane_state->visible since we can't handle a disabled
> primary plane yet.
>
> drivers/gpu/drm/vkms/vkms_plane.c | 29 +++++++++++++++++++++++++++++
> 1 file changed, 29 insertions(+)
>
> diff --git a/drivers/gpu/drm/vkms/vkms_plane.c
> b/drivers/gpu/drm/vkms/vkms_plane.c
> index 877483984897..aaf7c35faed6 100644
> --- a/drivers/gpu/drm/vkms/vkms_plane.c
> +++ b/drivers/gpu/drm/vkms/vkms_plane.c
> @@ -7,6 +7,7 @@
> */
>
> #include "vkms_drv.h"
> +#include <drm/drm_atomic.h>
> #include <drm/drm_atomic_helper.h>
> #include <drm/drm_gem_framebuffer_helper.h>
> #include <drm/drm_plane_helper.h>
> @@ -25,6 +26,33 @@ static void vkms_primary_plane_update(struct drm_plane
> *plane,
> {
> }
>
> +static int vkms_plane_atomic_check(struct drm_plane *plane,
> + struct drm_plane_state *state)
> +{
> + struct drm_crtc_state *crtc_state;
> + int ret;
> +
> + if (!state->fb | !state->crtc)
> + return 0;
> +
> + crtc_state = drm_atomic_get_crtc_state(state->state, state->crtc);
> + if (IS_ERR(crtc_state))
> + return PTR_ERR(crtc_state);
> +
> + ret = drm_atomic_helper_check_plane_state(state, crtc_state,
> + DRM_PLANE_HELPER_NO_SCALING,
> + DRM_PLANE_HELPER_NO_SCALING,
> + false, true);
> + if (ret != 0)
> + return ret;
> +
> + /* for now primary plane must be visible and full screen */
> + if (!state->visible)
> + return -EINVAL;
> +
> + return 0;
> +}
> +
> static int vkms_prepare_fb(struct drm_plane *plane,
> struct drm_plane_state *state)
> {
> @@ -58,6 +86,7 @@ static void vkms_cleanup_fb(struct drm_plane *plane,
>
> static const struct drm_plane_helper_funcs vkms_primary_helper_funcs = {
> .atomic_update = vkms_primary_plane_update,
> + .atomic_check = vkms_plane_atomic_check,
> .prepare_fb = vkms_prepare_fb,
> .cleanup_fb = vkms_cleanup_fb,
> };
> --
> 2.17.1
>
--
Sean Paul, Software Engineer, Google / Chromium OS
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